KENSINGTON, Md. (WUSA) -- The man police say killed his wife and dumped her body on a busy Montgomery County street has taken his own life. As recently as Saturday, 36-year-old Heather Lynn McGuire of Rockville, Md. told police she feared for her life.

Tuesday morning, McGuire shot in the head on Connecticut Avenue and Knowles Street. 9NEWS NOW's Kristin Fisher reported that a woman was trying to get out of a van, but a male driver pulled her back in, shot her, pushed her out onto the street, and sped away. A witness says that the woman was screaming for help and already covered in blood when the driver pulled her back into the van and shot her.

Police received multiple calls came into the Montgomery County 911 center to report the shooting in the area around 9:39 a.m. Tuesday. Officers arrived at the scene and shut down Connecticut Avenue in both directions while they searched for a suspect.

Police put a lookout for a green or gray minivan last seen headed southbound on Connecticut Avenue.

They later identified the suspect as 51-year-old Philip Joseph Gilberti, and believed he may be on foot and be carrying a firearm. They released a description of him as a man approximately 6 feet tall, 250 pounds, and last seen wearing a red shirt, dark jeans, dark boots and carrying a dark duffle bag.

A tip on Tuesday evening led police to the College Gardens area of Rockville. Montgomery County Police Chief Thomas Manger told 9News Now that after police zeroed in on the Rockville house where they believed Gilberti was inside, they heard a gunshot. They later entered the home to find Gilberti dead from an apparent gunshot wound.

Manger said that all day and evening Tuesday, officers were in place "all over the county" to ensure no one else was harmed, as the suspect had made threats against others.

Montgomery County police are investigating what led up to McGuire's murder and the suicide of Philip Gilberti.

McGuire is described as having a relationship with shooting suspect Philip Joseph Gilberti. Court documents indicate the two had once been married.

A police spokesperson described the killing as domestic in nature. Court records show that Gilberti has had nine peace orders against him since 2004 involving three different women.

Police Chief J. Thomas Manger says that the shooting took place as the two were in a minivan heading south on Connecticut Avenue, and that Gilberti was believed to have pushed the victim out of the vehicle.